/****************************************************************
Copyright 1990, 1991, 1994 by AT&T Bell Laboratories and Bellcore.

Permission to use, copy, modify, and distribute this software
and its documentation for any purpose and without fee is hereby
granted, provided that the above copyright notice appear in all
copies and that both that the copyright notice and this
permission notice and warranty disclaimer appear in supporting
documentation, and that the names of AT&T Bell Laboratories or
Bellcore or any of their entities not be used in advertising or
publicity pertaining to distribution of the software without
specific, written prior permission.

AT&T and Bellcore disclaim all warranties with regard to this
software, including all implied warranties of merchantability
and fitness.  In no event shall AT&T or Bellcore be liable for
any special, indirect or consequential damages or any damages
whatsoever resulting from loss of use, data or profits, whether
in an action of contract, negligence or other tortious action,
arising out of or in connection with the use or performance of
this software.
****************************************************************/

#include "defs.h"
#include "iob.h"

#define MEMBSIZE	32000
#define GMEMBSIZE	16000

 char *
#ifdef KR_headers
gmem(n, round)
	int n;
	int round;
#else
gmem(int n, int round)
#endif
{
	static char *last, *next;
	char *rv;
	if (round)
#ifdef CRAY
		if ((long)next & 0xe000000000000000)
			next = (char *)(((long)next & 0x1fffffffffffffff) + 1);
#else
#ifdef MSDOS
		if ((int)next & 1)
			next++;
#else
		next = (char *)(((long)next + sizeof(char *)-1)
				& ~((long)sizeof(char *)-1));
#endif
#endif
	rv = next;
	if ((next += n) > last) {
		rv = Alloc(n + GMEMBSIZE);

		next = rv + n;
		last = next + GMEMBSIZE;
		}
	return rv;
	}

 struct memblock {
	struct memblock *next;
	char buf[MEMBSIZE];
	};
 typedef struct memblock memblock;

 static memblock *mem0;
 memblock *curmemblock, *firstmemblock;

 char *mem_first, *mem_next, *mem_last, *mem0_last;

 void
mem_init(Void)
{
	curmemblock = firstmemblock = mem0
		= (memblock *)Alloc(sizeof(memblock));
	mem_first = mem0->buf;
	mem_next  = mem0->buf;
	mem_last  = mem0->buf + MEMBSIZE;
	mem0_last = mem0->buf + MEMBSIZE;
	mem0->next = 0;
	}

 char *
#ifdef KR_headers
mem(n, round)
	int n;
	int round;
#else
mem(int n, int round)
#endif
{
	memblock *b;
	register char *rv, *s;

	if (round)
#ifdef CRAY
		if ((long)mem_next & 0xe000000000000000)
			mem_next = (char *)(((long)mem_next & 0x1fffffffffffffff) + 1);
#else
#ifdef MSDOS
		if ((int)mem_next & 1)
			mem_next++;
#else
		mem_next = (char *)(((long)mem_next + sizeof(char *)-1)
				& ~((long)sizeof(char *)-1));
#endif
#endif
	rv = mem_next;
	s = rv + n;
	if (s >= mem_last) {
		if (n > MEMBSIZE)  {
			fprintf(stderr, "mem(%d) failure!\n", n);
			exit(1);
			}
		if (!(b = curmemblock->next)) {
			b = (memblock *)Alloc(sizeof(memblock));
			curmemblock->next = b;
			b->next = 0;
			}
		curmemblock = b;
		rv = b->buf;
		mem_last = rv + sizeof(b->buf);
		s = rv + n;
		}
	mem_next = s;
	return rv;
	}

 char *
#ifdef KR_headers
tostring(s, n)
	register char *s;
	int n;
#else
tostring(register char *s, int n)
#endif
{
	register char *s1, *se, **sf;
	char *rv, *s0;
	register int k = n + 2, t;

	sf = str_fmt;
	sf['%'] = "%";
	s0 = s;
	se = s + n;
	for(; s < se; s++) {
		t = *(unsigned char *)s;
		s1 = sf[t];
		while(*++s1)
			k++;
		}
	sf['%'] = "%%";
	rv = s1 = mem(k,0);
	*s1++ = '"';
	for(s = s0; s < se; s++) {
		t = *(unsigned char *)s;
		sprintf(s1, sf[t], t);
		s1 += strlen(s1);
		}
	*s1 = 0;
	return rv;
	}

 char *
#ifdef KR_headers
cpstring(s)
	register char *s;
#else
cpstring(register char *s)
#endif
{
	return strcpy(mem(strlen(s)+1,0), s);
	}

 void
#ifdef KR_headers
new_iob_data(ios, name)
	register io_setup *ios;
	char *name;
#else
new_iob_data(register io_setup *ios, char *name)
#endif
{
	register iob_data *iod;
	register char **s, **se;

	iod = (iob_data *)
		mem(sizeof(iob_data) + ios->nelt*sizeof(char *), 1);
	iod->next = iob_list;
	iob_list = iod;
	iod->type = ios->fields[0];
	iod->name = cpstring(name);
	s = iod->fields;
	se = s + ios->nelt;
	while(s < se)
		*s++ = "0";
	*s = 0;
	}

 char *
#ifdef KR_headers
string_num(pfx, n)
	char *pfx;
	long n;
#else
string_num(char *pfx, long n)
#endif
{
	char buf[32];
	sprintf(buf, "%s%ld", pfx, n);
	/* can't trust return type of sprintf -- BSD gets it wrong */
	return strcpy(mem(strlen(buf)+1,0), buf);
	}

static defines *define_list;

 void
#ifdef KR_headers
def_start(outfile, s1, s2, post)
	FILE *outfile;
	char *s1;
	char *s2;
	char *post;
#else
def_start(FILE *outfile, char *s1, char *s2, char *post)
#endif
{
	defines *d;
	int n, n1;
	extern int in_define;

	n = n1 = strlen(s1);
	if (s2)
		n += strlen(s2);
	d = (defines *)mem(sizeof(defines)+n, 1);
	d->next = define_list;
	define_list = d;
	strcpy(d->defname, s1);
	if (s2)
		strcpy(d->defname + n1, s2);
	in_define = 1;
	nice_printf(outfile, "#define %s", d->defname);
	if (post)
		nice_printf(outfile, " %s", post);
	}

 void
#ifdef KR_headers
other_undefs(outfile)
	FILE *outfile;
#else
other_undefs(FILE *outfile)
#endif
{
	defines *d;
	if (d = define_list) {
		define_list = 0;
		nice_printf(outfile, "\n");
		do
			nice_printf(outfile, "#undef %s\n", d->defname);
			while(d = d->next);
		nice_printf(outfile, "\n");
		}
	}
